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Consolidated Statements of Comprehensive Income (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Statement Of Income And Comprehensive Income [Abstract]
Net income	$ 8,661	$ 3,014	$ 18,330	$ 10,003
Other comprehensive income (loss), net of reclassification adjustment:
Unrealized holding gains (losses) on available for sale securities	6,299	(684)	12,441	(3,898)
Tax effect	(1,323)	143	(2,612)	818
Pension liability adjustment	147	143	294	286
Tax effect	(31)	(30)	(62)	(60)
Total other comprehensive income (loss)	5,092	(428)	10,061	(2,854)
Comprehensive income	$ 13,753	$ 2,586	$ 28,391	$ 7,149

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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